Portable charger



FIG. 1 is a left side top perspective view of our new design for a portable charger;

FIG. 2 is a right side bottom perspective view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a bottom view of FIG. 1;

FIG. 5 is a front elevational view of FIG. 1, a back elevational view being identical; and,

FIG. 6 is a left side elevational view of FIG. 5, a right side elevational view being identical.

The broken lines illustrate environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a portable charger, as shown and described. 